2011-10-12_HYDROLOGY - P2008046 - Laserfiche WebLink

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Formation or Stratigraphic Zone Name Age Top (ft) Base (ft) Thickness Penetrated (ft) Lithology Uinta Eocene 0 558 558 Lt yellow brown to gray brown siltstone or fine grained sandstone with localized coarse grained to conglomeratic sandstone beds Green River - RS Eocene 558 962 404 dusky brown marlstone with occasional light to medium brown and light to medium gray siltstone Green River - A Groove Eocene 962 974 12 medium brown marlstone with light brown to tan lamination, tan silty Green River - Mahogany Eocene 974 1,113 139 dusky to medium brown marlstone, occasional light brown lean interbeds, common calcite on fracture and joint faces Green River - B Groove Eocene 1,113 1,133 20 pale to yellow brown marlstone, common light gray brown lamination, fractured throughout, occasional calcite clasts Green River - R6 Eocene 1,133 1,269 136 pale /dusky brown grading to gray brown, common medium gray marlstone, common turbated bedding, common siltstone interbeds and laminations. occasional 3 -4mm Green River - LS Eocene 1,269 1,337 68 olive gray to yellow gray marlstone, occasional medium gray mudstone interbeds, common calcite specks Green River - R5 Eocene 1,337 1,529 192 medium to pale brown marlstone, dusky brown with occasional light brown lams, common vugs, occasional healed breccia zones and anhydrite healed fractures Green River - L4 Eocene 1,529 1,570 41 light brown to gray brown marlstone, grading to dusky brown in part, common disseminated pyrite Green River - R4 Eocene 1,570 1,726 156 gray brown with dusky to pale brown nterbeds and laminations, common fish remains, common vugs and disseminated anhydrite crystals and pyrite Green River - L3 Eocene 1,726 1,774 48 moderate yellow brown to dusk brown marlstone, occasional moderate yellow brown siltstone, common vugs, gassy Green River - R3 Eocene 1,774 1,854 80 moderate yellow brown /brown marlstone, very vuggy above the dissolution surface, common kerogen zones, trace of honeycomb nahcolite, trace anhydrite in vugs Green River - L2 Eocene 1,854 1,903 49 gray brown marlstone with dusky brown laminations, occasional "rootbeer" nahcolite crystals, occasional pale yellow brown rip -up Green River - R2 Eocene 1,903 1,953 50 dusky brown /yellow brown marlstone, occasional anhydrite on bedding planes and fracture faces, occasional light brown thin laminations Green River - Ll Eocene 1,953 1,975 22 medium to olive gray marlstone, lean, rare very thin dusky brown Green River - R1 (Test Interval Eocene 1,975 2,136 161 dark dusky brown /dark gray marlstone, becoming shaley in texture, occasional pale brown laminations, occasional white blebs of calcite, common poker chip fracturing Green River - LO Eocene 2,136 2,168 32 gray brown marlstone with olive gray interbeds and laminations, common dusky yellow brown zones, common poker chip fracturing Green River - RO Eocene 2,168 TD = 2,250 82 moderate to dusky brown marlstone, common yellow brown laminations, fissile, uniform poker chipping Attachment Completion Form for Injection Wells AMSO UIC Permit No. CO52154 -08524 The "injection well" (designated T -1P) is a component of a pilot retort test being conducted by American Shale Oil, LLC in Rio Blanco County, Colorado. The well is not a typical injection well as the well will not be used to inject fluids into a permeable unit; rather, the well will be used to recirculate fluids through a pilot retort interval within very low permeability shale. As a result, some of the information requested in this attachment is not applicable to well T -1P. I. Geologic Information 1. Lithology and Stratigraphy A. Provide a geologic description of the rock units penetrated by name, age, depth, thickness, and lithology of each rock unite penetrated.